need more info.
assume that is you
do you still have the following?
driver licence, health card, family ties
Did you report any income when you filed last year.
you are most likely be considered a resident for tax purposes.
If you meet all other requirements to be non-resident ,
then
Any individual that is a non-resident of Canada who has a valid SIN and who is 18 years of age or older is also eligible to open a TFSA. However, any contributions made while a non-resident will be subject to a 1% tax for each month the contribution stays in the account
https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/tax-free-savings-account/who-open-a-tfsa.html